Furnace.



PATBNTED DEO. 13, 1904.

W. E. WALSH.

FURNAGE.

APPLmATIoN rmm 11.13.26, 19

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UNTTED STATEs Patented. December 13, 1904.

WILLIAM E. VVALSl-I, OF MORRIS, ILLINOIS.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 777,454, dated December 13, 1904. Application filed March 26, 190e. Serial No. 200,162. (No model.)

T all when?, it may concern:

Be it known that I, INILLIAM E. I/VALsrI, a citizen of the United States, residing at Morris, in the county of Grundy and State of Illinois, have invented certain new and useful Improvements in Furnaces, of which the following is a specification.

The object of this'invention is to construct a furnace having air-passages so arrang'ed and distributed within the walls of the furnace that streams of highly-heated air may be distributed over the grate of the furnace at the i most advantageous points in order to increase the combustion of the furnace, eliminate smoke, and increase the heating capacity.

A further object of the invention is to so arrange the grate with respect to the furnacewalls that the fuel may be fed thereonto without interfering' in any way with the air distribution or with the manipulation of the furnace, and the furnace is so constructed that it may be operated in series or independently without changing' its construction or arrangement, which is a feature of g'reat importance in the art to which the present invention relates.

A further Objectis to so arrange the airsupply passages that the air carried therethrough will be heated to a very high degree of temperature before it is discharged into the combustionchamber, and the combustion-chamber is so arranged and constructed that it will aiford the greatest amount of radiating-surface for the heating' of the air in its passage to the point of combustion.

rI`he invention consists in the features of construction and combination of parts hereinafter described and claimed.

In the drawings illustrating the invention, Figure l is a perspective view of the entire furnace, showing' the walls partly broken away; Fig. 2, a perspective view showing the top of the inclosing wall entirely broken away; Fig. 3, a cross-sectional view through the furnace, and Fig. I a detail of one of the metallic plates or fins for increasing the radiation of the heatingchamber.

The furnace is constructed to have a front wall A, side walls A, a rear wall A2, and a top wall A3, forming a complete inclosure on all sides of the furnace. The front wall is provided with an opening a, leading' to the combustionehamber, and said opening is closed by a door a of any suitable construction. Within the front wall is a chamber B, having inlet openings opening thereinto, and within the outer inclosing walls of the furnaceis an arched combustion-chamber C, having' a rounded top o and side walls e', the top and side walls being' spaced to leave a heating-chamber C all the way round the arched co1nbustion-chambcr within the outer lwalls of the flu'nace, and said heating-cham ber communicates with the chamber B in the front wall of the furnace.

The heating-chamber is divided into a front cham ber c2 and a rear chamber c by means of a diagonally-extending cross-wall l), which extends over and around the arched combustion-chamber and entirely separates the front and rear divisions from one another, so that air entering through the opening' I) will pass up in a diagonal line to enter the forward heatingchamber at its contracted side and pass over the arched combustion-chamber and down on the enlarged o'r disteuded side of the heatingchamber, as shown by the arrows. The rear division of the heating-chamber is provided with an opening d in the side of the furnace, near the rear end thereof, which allows air to enter the contracted portion of the rear chamber and passing up over the arch in a direction opposite to that hitherto described to pass down on the opposite side of the eoxnbastion-chamber.

In one side of the furnace are a series of discharge-openings fl', cut in the side wall of the combustion-chamber and opening into the enlarged or expanded portion of the forward heating-chamber, and on the opposite side the side walls of the combustion-ehamber are cut away to leave a longitudmally-extendmg slot or opening' d for the (ilischarge ofthe air passing,.through the rear heating-cham` ber, thereby adapting the furnace to dls- `charge air inwardly on opposite sides of the` combustion-chamberfithin the combus tion-chamber is a longitudinally-extending` grate E, arranged on an incline and having' its upper edge immediately beneath the dis- TOO charge-opening d2, and fuel is fed onto the sloping grate by means of a chute e, located in the side of the furnace, and the grate is provided with a series of openings e', within which operate a series of segmental stolzingplates e2 for feeding the fuel down the incline prior to its discharge by means of the dumping-grate e3 at the lower edge of the inclined grate.

The walls of the arched combustion-chamber are preferably constructed, as shown in Fig. 3, to have a series of metal plates or fins c* inserted in the brickwork of the combustion-chamber and outwardly projecting therefrom into the heating-chamber to increase the heating properties of the walls of the combustion-chamber by reason of the superior conductivity of the metal plates or fins, and, as shown in Fig. 3, it is desirable to have the plates or lins project outwardly a short distance into the heating-chamber. The cornbustion-chamber terminates at its rear end in an opening E', which may connect with the escape-flue of the furnace or with the heating-chamber of another furnace adapted to operate in tandem with the furnace herein described.

Within the forward portion of the heatingchamberl on the enlarged side thereof is located a pipe F, open at its forward end, in line with which is a compressed-air or steam pipe f, adapted to discharge a jet of compressed air or steam into the end of the pipe F, and the pipe F passes through the cross-Wall D into the rear portion of the heating-chamber and is connected with a return-pipe f parallel with the pipe F, which return-pipe passes downwardly along the side wall of the combustion-chamber and connects with the discharge-pipe f2, having openings f3 in line with the openings CZ in the walls of the coinbustion-chamber.

In the enlarged portion of the rear section of the heating-chamber and oppositely disposed to the pipes hitherto described is located a coil of pipe G, which runs forward and bacl along' the side of the combustionchamber, and in line with the open end of said pipe is likewise a compressed-air or steam pipe g, adapted to discharge thereinto, and the coil of pipe Gr terminates in a dischargepipe g', having discharge-openings g2 in line with the elongated opening into the combustion-chamberv above the upper edge of the inclined grate therein. rlhe furnace is provided with doors H in its front wall leading to the ash-pit beneath the grate, as in furnaces of ordinary construction.

- In use fuel is fed to the inclined grate from the chute in the side of the furnace and ignited, and the doors H are preferably opened to initially create a draft up through the grate, and when the fire has been ignited a suiiicient time to heat the walls of the combustion-chamber the air will be drawn in through the openings b and Z into the front and rear divisions of the heating-chamber, and the air so drawn will pass over the arched combustion-chamber in reverse direction and be discharged in opposite directions over the inclined grat@ within the combustion-chamber. In ord er toA increase the draft of air and the rapidity of its discharge, the compressedair or steam pipes are provided, and when a jet of air or steam is blown into the ends of the coiled pipes within the front and rear sections of the heating-chamber the heated air therein will be drawn or sucked into the open ends of the pipes and carried therethrough and discharged through the openings on opposite sides of the combustion-chamber, which discharge of compressed airor steam will tend to increase the discharge of air from all portions of the heating-chamber, although but a small portion of the total amount of heated air therein is drawn into the pipes.

The arrangement is one which affords the maximum amount of heating-surface for the air in the heating-chambers prior to its discharge therefrom` since the entire surface of the combustion-chamber is traversed by the air prior to its discharge within the combustion-chamber. The construction is one which utilizes the heating properties of the furnace to the utmost, and at the same time the arrangement of passages and pipes in no wise interferes with the manipulation of the furnace, thus enabling the sanne to be used in tandem or series with other furnaces of a similar character.

That I regard as new, and desire to secure by Letters Patent, is-

l. In a furnace, an exterior shell or casing, a combustion-chamber within the exterior shell or casing and having walls of a size to leave a heating-chamber extending from front to rear of the furnace and on the top and sides of the combustion-chamber, a cross-wall dividing the heating-chamber into two divisions, an air-inlet port for each division, and an airdischarge opening for each of the divisions on the side of the combustion-chamber opposite to the inlet-port for such division, substantially as described.

2. In a furnace, the combination of an eX- terior shell or casing, a combustion-chamber Within the shell or casing and of a size to leave a heating-chamber around the combustion-chamber, a diagonally-extending crosswall dividing the heating-chamber into two divisions, each liavinga contracted and an enlarged portion, an air-supply port entering the contracted portion of each division, and a discharge-opening for the enlarged portion of each division adapted to discharge air on opposite sides into the combustion-chamber, substantially as described.

3. In a furnace, the combination of an eX- terior shell or casing, an arched combustionchamber therein of a size to leave a heating- IOO IIS

777,454; tdt

chamber between the walls of the combustionchamber and the exterior shell or casing, a diagonally-extending cross-wall dividing the heating-chamber into two divisions, each hav- 5 ingicontracted and enlarged portions oppositelfv disposed with respect to one another, air-inlet ports opening' into the contracted portions of the divisions of the heating-chainber,.an inclined grate within the combustionchamber, adischarge-opening above the grate lor one o't the divisions of the heating-chamber, and a discharge-opening on the opposite side of the combustion-chamber 'for the other division of the heating-chamber, substantially as described.

4. In a furnace, the combination ot' an exterior shell or casing, an arched combustionchamber therein of a size to leave a heatingcharnber between the walls of the combustionchambcr and the exterior shell or casing, a diagonallyextending cross-wall dividing the ,heating-chamber into two divisions, each havfing contracted and enlarged port-ions oppoisitely disposed with respect to one another, 2 5 `air-inlet ports opening into the contracted portions of the divisions of the heating-cham- Lber, an inclined grate within the combustionchamber, a discharge-opening above the grate for one oi' the divisions of the heating-chamber, a discharge-opening on the opposite side of the combustion-chamber for the other division of the heating-chamber, a coil of pipe for each of the divisions of the heating-chamber, cach coil of pipe having a discharge- 5 opening in line with the discharge-opening for said division oil the heating-chamber, and a pipe adapted to discharge a jet of steam or compressed air into the end of each o1" the i coils of pipe for creating asuction ther-cinto, .o substantially as described.

5. ln a furnace, the combination of an exterior shell or casing, a combustion-chamber within the exterior shell or casing of a size to leave a heating-chamber between the shell or 5 casing and the walls of the combustion-chainber, a port for admitting' air to the heatingchamber, a discharge-oliiening on the opposite side ot the heating-chamber for discharging air into the combastion-chamber, a pipe within the heating-chamber having a dischargeopening in line with the discharge-opening in the l'ieating-chamber, and a pipe adapted to discharge a jet of compressed air or steam into the inst-mentioned pipe to create a suction thereinto, substantially as described.

6. ln a furnace, the combination of an exterior shell or casing, a combustion-chamber within the exteriorl shell or casing of a size to leave a heating-chamber between the exterior D shell or casing and the walls of the combustion-chamber, a wall dividing the heatingchamber into two divisions, an air-supply port for each of the divisions, an air-discharge openingI for each of the divisions, a pipe with- 5 in each of the divisions having a dischargeopening' in line with the discharge-opening For the division, and pipes adapted to discharge jets of steam or compressed' air into the iirst-mentioned pipe, substantially as described.

7. ln a furnace, the combination ot' a shell or casing, an arched comlmstion-cham ber within the shell or casingoi asize to leave a heating-chamber between the exterior shell or cas- .ing and the walls of the combustiori-chamber, a diagonally-extending cross-wall dividing the heating-chamber into front and rear divisions, each having a contracted portion on one side of the combustion-chamber and an enlarged portion on the opposite side, an air-supplyT port for the contracted portion el each of the divisions ot' the heating-chamber, a longitudinally-extendiiig inclined grate within the combustion-chamber located below one of the edges thereof and in a position to have heated air discharged thereonto from one of the divisions oi" theheating-chamber, achnte adapted to discharge onto the inclined grate, and an air-discharge opening leading from the other division oi the heating-chamber and adapted to discharge air above the grate on the opposite side, substantially as described.

8. ln a furnace, the combination oi a shell or casing, an arched combnStien-chamber within the shell or casing oi a size to leave a heating-chamber between the exterior shell or casing and the walls of the combnstion-chamber, a diagonally-extending cross-wall divid ing the heating-chamber into front and rear divisions, each having a contracted portion on one side of the combnstion-chamber and an enlarged portion on the opposite side, an air-supply port for the contracted portion oi" each of the divisions of the heating-chamber, a longitudinally-extending inclined grate within the combustion-chamber located below one oi'l the edges thereof and in a position to have heated air discharged thereonto from one of the divisions of the heating-chamber, a chute adapted to discharge onto the inclined grate, an airdischarge opening leading' from the other division of the heating-chamber and adapted to discharge air above the grate on the opposite side, a pipe within each ol the divisions of the heating-chamber having a discharge-opcning in line with the discharge-opening for said division, and a pipe for each division ol the heating-chamber adapted to discharge a jet of steam or compressed air into the first-mentioned pipe for creating a suction thereinto, substantially as described.

9. In a furnace, the combination ot' an cxterior shell or easing, an arched combustionchamber therein ols a size to leavel a heatingchamber between the walls oi' the conibnstionchamber and the exterior shell or casing, a diagonally-extending cross-wall dividing the heating-chamber into two divisions each having contracted and enlarged portions oppositely disposed with respect to one another,

IOO

air-inlet ports opening into the contracted por- 'sions of the divisions of the heating-chamber, a grate within the combustion-chamber, and air-discharge openings from the two divisions of the heating-chamber adapted to discharge air into the combustion-cham ber, substantially as described.

10. In a furnace, an exterior shell or casing, a combustion-chamber Within the exterior shell or casing and having walls of a size to leave a heating-chamber extending from front to rear of the furnace and on the top and sides of the combustion-chamber, a cross-Wall dividing the heating-chamber into two divisions, an air-inlet port for each division, and an airdischarge openingfor each division adapted to discharge into the combustion-Charlier, substantially as described.

WILLIAM E. WALSH. Vitnesses: f'

SAMUEL NV. BANNING, VALKER BANNING. 

